package work2;

import java.sql.*;

/**
 * 所有Dao的父类
 */

public class BaseDao {
    protected Connection con;//连接对象
    protected PreparedStatement ps ;//sql语句执行对象
    protected ResultSet rs;//结果集对象
    static {
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 建立连接
     */
    public void setConnection(){
        try {
            this.con= DriverManager.getConnection("jdbc:mysql://localhost:12345/mydb?characterEncoding=utf-8",
                    "root","lovo");
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }

    public  void  closeConnection(){
        try {
            if (rs!=null){
                rs.close();
            }
            if (ps!=null){
                ps.close();
            }
            if (con!=null){
                con.close();
            }

        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

}
